APA (7th ed.) Citation

Gilbert, O. E. (2008). Native American code talker in World War II. Osprey.

Chicago Style (17th ed.) Citation

Gilbert, Oscar E. Native American Code Talker in World War II. Oxford: Osprey, 2008.

MLA (9th ed.) Citation

Gilbert, Oscar E. Native American Code Talker in World War II. Osprey, 2008.